B-Line Eaton series strut fittings and accessories, 3.5" Height, 3.5" Length, 1.62" Width, .765lbs, Steel, Flat three hole corner gusset plate, Thickn

The B135SS4 corner gusset plate is stainless steel, type 304. That matters if you are building strut framing outdoors, in a wash-down area, or in a corrosive process space where plated fittings would rust at the cut edges. Pair it with stainless strut and stainless channel nuts and bolts so you are not mixing metals in the connection.

No. The B135SS4 is the plate only, three holes in a flat corner gusset. You supply the fasteners: typically 1/2 inch channel nuts and hex bolts, in stainless to match the 304 plate, one set per hole.

Stated dimensions are 3.5 inch height, 3.5 inch length and 1.62 inch width, and it weighs .765 lb. The 3.5 by 3.5 leg geometry is what you check against your strut run: each leg needs to land flat on the channel face with its holes clear of the strut end so you can get a channel nut behind them.

They do different jobs. An angle fitting turns the run and carries the load through the bend. A flat gusset like the B135SS4 lies on the face of both strut members across the corner and triangulates the joint, so it is what you add when a bolted corner is flexing or you want a braced frame for a rack or support stand. On heavier frames people use both: the angle to make the turn, the gusset to stiffen it.

Type 304 stainless is the standard choice for exterior strut framing and wash-down or food processing areas, and that is what this plate is made of. Keep the rest of the assembly stainless too, since a plated bolt through a stainless plate will be the part that corrodes first. Note that no certifications are carried on this part, so if your spec calls for a listed component, check the drawing.

Order Eaton B-Line B135SS4. The SS4 suffix is the type 304 stainless version, which distinguishes it from the plain and plated finishes of the same plate geometry.